1 Departments of Population and Public Health Sciences, and Psychology, and School of Social Work, University of Southern California, Los Angeles, CA 90032-3628, USA.
2 Department of Special Needs Education, Ghent University, 9000 Ghent, Belgium.
"Vulnerable populations" in health behavior research, practice and policy is generally used to refer to groups that, due to their life circumstances, may require extra consideration, reasonable accommodation, and legitimized protection [...].